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4. SERVICE AND MAINTENANCE
All adjustment, conversion, commissioning and maintenance operations described be-
low must only be carried out by Qualified Personnel (meeting the professional technical
requirements of current regulations) such as the personnel of the Local After-Sales
Technical Service.
FERROLI declines any liability for damage and/or injury caused by unqualified and un-
authorised persons tampering with the unit.
4.1 Adjustments
TEST mode activation
Press the heating buttons -/+ (details 3 and 4 - fig. 1) together for 5 seconds to activate
the TEST mode. The boiler will light irrespective of the heating or hot water demand.
The heating symbol (detail 24 - fig. 1) and DHW symbol (detail 12 - fig. 1) flash on the
display.
fig. 24 - TEST mode
To deactivate the TEST mode, repeat the activation sequence.
The TEST mode is automatically disabled in any case after 15 minutes.
Burner adjustment
The burner is factory-set as given in table 2. The burner can be set to a different power
output by adjusting the pump pressure, nozzle, head or air adjustment as described in
the following sections. In any case, the new power setting must come within the boiler's
rated working range. After making any adjustments, use a combustion analyser to check
that the CO
% in the fumes is between 11% and 12%.
2
Table. 2 - Burner adjustment
Boiler
Heating
Burner
Burner
model
capacity
model
flow rate
US
kW
kg/h
Gall/h
ATLAS D 25
28.3
SUN G6
2.24
0.60
SI UNIT
ATLAS D 37
41.9
SUN G6
3.32
0.85
SI UNIT
Oil nozzle delivery table
table 3 indicates the oil deliveries (in kg/h) as the pump and nozzle pressure changes.
N.B. - The values given in the table are approximate, since the nozzle deliveries can vary by
± 5%. Also, for burners with a preheater, the fuel flow rate decreases by approximately 10%.
Table. 3
Pump pressure kg/cm
NOZZLE
8
9
G.P.H.
0.40
1.36
1.44
0.50
1.70
1.80
0.60
2.04
2.16
0.65
2.21
2.34
0.75
2.55
2.70
0.85
2.89
3.06
1.00
3.40
3.61
Delivery at nozzle outlet in kg/h
42
All manuals and user guides at all-guides.com
Pump
Head
Nozzle
pressure
adjustment
adjustment
Angle
Fault
Bar
L
60°
35601540
9
19
60°
35601340
9
25
2
10
11
12
13
1.52
1.59
1.67
1.73
1.90
1.99
2.08
2.17
2.28
2.39
2.50
2.60
2.47
2.59
2.71
2.82
2.85
2.99
3.12
3.25
3.23
3.39
3.54
3.68
3.80
cod. 3541I070 - Rev. 04 - 04/2018
Pump pressure adjustment
The pump pressure is factory set for optimum operation and should not normally be
changed. However, if special needs require a different pressure, after applying the pres-
sure gauge and lighting the burner turn the adjustment screw "6" indicated in fig. 26. It is
anyhow recommended to keep within the range of 10 - 14 bar
10
15
5
0
Air
Notch
8
13
1.
Inlet (suction)
2.
Return
3.
Outlet to nozzle
14
4.
Pressure gauge connection
5.
Vacuum gauge connection
1.80
6.
Adjustment screw
2.25
7.
By-pass screw
2.70
Head and air shutter
2.92
Adjust the head and air flow rate according to the burner power as indicated in fig. 27
3.37
Turn the head adjustment screw B (fig. 28) clockwise or anticlockwise until the mark on
3.82
rod A (fig. 28) coincides with the pointer.
1,26
1,69
2,11
fig. 27 - Burner adjustments graph SUN G6
A
Power
B
Adjustment pointer
C
Oil flow rate
"L" head (mm)
Air
ATLAS D SI UNIT
20
25
fig. 25 - SUNTEC pump
10
15
5
20
0
25
fig. 26 - DANFOSS pump
2,53
2,95
3,37
3,79
4,22
4,64
5,06
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